Proactive Spectrum Handover Based on Packet Scheduling Algorithm in Cognitive Radio Networks
Xianzhong Xie · Dianzi xuebao · 2013
In cognitive radio networks,spectrum handover occurs when a secondary user changes frequency due to the appearance of a primary user.Proactive spectrum handover may result in aggraded bandwidth utilization performance and degraded packet loss probability.Here,we develop a proactive spectrum handover mechanism by using an efficient packet scheduling algorithm,to reduce unusable channel.It effectively integrates two algorithms:spectrum hole filling algorithm and packet migration algorithm,to minimize packet loss probability and reduce the bandwidth fragment.The efficiency of the mechanism is validated by simulation results.